GRS 5SMP-8

4Ω
8Ω

Woofer

Nominal diameter5.25″ / 145 mm
Resonance55 Hz
Q factor0.44
Sensitivity85 dB
Linear excursion± 2 mm
Program power70 W
GRS 5SMP-8 WooferGRS 5SMP-8 WooferGRS 5SMP-8 Woofer
Impedance
Excursion
Velocity
SPL
Phase
Group delay
Step response
Tone Burst
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 85dB
  • Frequency response 50 - 2500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 55Hz
  • Mechanical quality factor QMS 3.26
  • Electrical quality factor QES 0.51
  • Total quality factor QTS 0.44

Large signal parameters

  • Maximum linear excursion (one way) xmax 2mm
  • Air volume displaced at xmax VD 16cm³
  • Power handling P 35W
  • Program power Pmax 70W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 6.0Ω
  • Inductance (1kHz) LE 1mH
  • VC Diameter 26mm
  • Former material Aluminum

Magnet

  • Force factor Bl 7N/A
  • Motor constant Bl/√RE 2.86N/√W
  • Diameter 100mm

Diaphragm

  • Effective diameter 101mm
  • Effective area SD 80cm²
  • Moving mass (including air load) MMS 12g
  • Moving mass MMD 11.4g
  • Material Damped poly cone

Suspensions

  • Stiffness KMS 1.43N/mm
  • Compliance CMS 700µm/N
  • Equivalent volume to the compliance VAS 6.4L
  • Mechanical resistance RMS 1.27N·s/m
  • Surround material Rubber

Dimensions

  • Nominal diameter 5.25″
  • 145mm
  • Overall diameter 145mm
  • Baffle cutout diameter 117mm
  • Overall depth 70mm
  • Flange thickness 6mm
  • Mounting depth 64mm
  • Volume occupied by the driver (estimated) 0.33L
Impedance
SPL
GRS 5SMP-8 Impedance
GRS 5SMP-8 SPL
GRS 5SMP-8 Dimensions
PDF fileDatasheet

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